package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {
    private static final long BEGIN_TIMESTAP=1640995200;
    private static final long COUNT_BITS=32;
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    public long nextId(String keyPrefix){
        LocalDateTime now = LocalDateTime.now();
        long second = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = second - BEGIN_TIMESTAP;
        String str = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + str);
        return timestamp<<COUNT_BITS|count;
    }
}
